Annual report pursuant to Section 13 and 15(d)

Nature of Business and Significant Accounting Policies (Revenue) (Details)

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Nature of Business and Significant Accounting Policies (Revenue) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Accounting Policies [Abstract]    
Prepaid Expense, Current $ 1.8  
Amortization of Deferred Charges 0.2  
Cost of Reimbursable Expense $ 19.9 $ 24.8